Technical design of the phase I Mu3e experiment
Technical design of the phase I Mu3e experiment
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DOI：
10.1016/j.nima.2021.165679
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发表时间：
2021-08-23
影响因子：
1.4
通讯作者：
Zhong, T.
中科院分区：
文献类型：
--
作者：
Arndt, K.;Augustin, H.;Zhong, T.
Mu 3e实验的目的是发现或排除在分支分数大于10（-16）时轻子味违反衰变μ-> μ的情况。实验的第一阶段使用Paul Scherrer研究所（PSI）现有的光束线，旨在达到2.10（-15）的单事件灵敏度。我们提出了一个概述的各个方面的技术设计和预期性能的第一阶段Mu 3e探测器。高达每秒10（8）μ子衰变的高速率以及衰变电子和正电子的低动量构成了一系列独特的挑战，我们使用基于高压单片有源像素传感器的超薄跟踪探测器与反射纤维和瓷砖相结合进行精确的定时测量。
The Mu3e experiment aims to find or exclude the lepton flavour violating decay mu -> eee at branching fractions above 10(-16). A first phase of the experiment using an existing beamline at the Paul Scherrer Institute (PSI) is designed to reach a single event sensitivity of 2.10(-15). We present an overview of all aspects of the technical design and expected performance of the phase I Mu3e detector. The high rate of up to 10(8) muon decays per second and the low momenta of the decay electrons and positrons pose a unique set of challenges, which we tackle using an ultra thin tracking detector based on high-voltage monolithic active pixel sensors combined with scintillating fibres and tiles for precise timing measurements.